TY  - JOUR
AU  - ATLAS Collaboration (Aad, G. et al
AU  - Amoros, G.
AU  - Cabrera Urban, S.
AU  - Castillo Gimenez, V.
AU  - Costa, M. J.
AU  - Escobar, C.
AU  - Ferrer, A.
AU  - Fuster, J.
AU  - Garcia, C.
AU  - Gonzalez de la Hoz, S.
AU  - Hernandez Jimenez, Y.
AU  - Higon-Rodriguez, E.
AU  - Irles Quiles, A.
AU  - Kaci, M.
AU  - Lacasta, C.
AU  - Lacuesta, V. R.
AU  - Marti-Garcia, S.
AU  - Miñano, M.
AU  - Mitsou, V. A.
AU  - Moles-Valls, R.
AU  - Moreno Llacer, M.
AU  - Oliver Garcia, E.
AU  - Perez Garcia-Estañ, M. T.
AU  - Ros, E.
AU  - Salt, J.
AU  - Solans, C. A.
AU  - Soldevila, U.
AU  - Sanchez, J.
AU  - Torro Pastor, E.
AU  - Valladolid Gallego, E.
AU  - Valls Ferrer, J. A.
AU  - Villaplana Perez, M.
AU  - Vos, M.
AU  - Wildauer, A.
PY  - 2011
DA  - 2011//
TI  - Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 294
EP  - 312
VL  - 697
IS  - 4
PB  - Elsevier Science Bv
KW  - ATLAS
KW  - LHC
KW  - Heavy ions
KW  - J/psi
KW  - Z boson
KW  - Centrality dependence
AB  - Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/psi mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy root s(NN) = 2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb(-1), J/psi mesons are reconstructed via their decays to mu(+)mu(-) pairs. The measured J/psi yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the mu(+)mu(-) final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/psi and Z production in lead-lead collisions at the LHC.
SN  - 0370-2693
UR  - http://arxiv.org/abs/arXiv:1012.5419
UR  - https://doi.org/10.1016/j.physletb.2011.02.006
DO  - 10.1016/j.physletb.2011.02.006
LA  - English
N1  - ISI:000288300400006
ID  - ATLASCollaborationAad_etal2011
ER  -